Consider your work on problem $1\mathrm{.}1.$ In this proplem which of the following best

interprets the energy productivity for $2021?$

Energy productivity in $2021$ is $0\mathrm{.}127.$ This suggests that for each BTU, we are

able to produce $0\mathrm{.}127$ units.

Energy productivity in $2021$ is $0\mathrm{.}260.$ This suggests that for each $0\mathrm{.}260$ units

produced $0\mathrm{.}260$ BTUs are utilized.

Energy productivity in $2021$ is $0\mathrm{.}133.$ This suggests that for each BTU, we are

able to produce $0\mathrm{.}133$ units.

Energy productivity in $2021$ is $0\mathrm{.}260.$ This suggests that for each BTU, we are

able to produce $0\mathrm{.}260$ units.